Well it would be ideal if you have 5 kage Madara or Shark Kisame

But generally for Shark Bomb team you'd want a pos1 Water Main - Kurenai pos3-4 there so you could remove debuffs in case of immobile/chaos on your water main, and well it's desire-able if you had a faster pos1

So let's say maybe you could do Water Main - Kurenai - Fuguki - Roshi (easy way to trigger Roshi chase and stack those poison damages from round 1)

or Water Main - Kurenai - Kushina Habanero - *x